Fig. 4 in Bone microstructure of the sphenodont rhynchocephalian Priosphenodon avelasi and its paleobiological implications

Fig. 4. Compaction index (CI) of several of the histological sections analyzed here from Priosphenodon avelasi (northern Patagonia, late Cretaceous). Note the high degree of compaction that both humerus present in comparison with the rest of the bone elements. A. Right humerus. B. Left humerus. C. Left radius. D. Left ulna. E. Right femur. F. Tibia. G. Fibula. H, I. Phalanges. J. Articulated presacral vertebrae. Scale bars 1 mm.